Core-extracting device



G. l. KENISTON ET AL Nov. 22, 1927.

Patented Nov. 22, 1927.

UNITED STATES GEORGE IRVIN xENIsToN, or LoNG BEACH, AND CHAELESYERNESTPRIEsrLEYno- F l TOEEANCE, CALIFORNIA, AssIerNoEs To c YRUs BELE, oELosANGELES, `GALI- 'Application led July 1-7,

This invention relates to a vdevice forex- Y tracting a core from acore-barrel. Such core-barrelsY are usedin deep well drilling operationsinrorder to enable the samples of the strata'to be taken for inspectionby the driller. It is desirable, if possible, to de liver the core tothe driller intact as taken by the core barrel of the drill, that yis tosay, without breaking upthe core or disturbing the relation of itsparts, to the end that the core, after extraction from the barrel, willshow the natural relation ofthe stratasand or earth through which thecore drill is passed. V

Y The general object of this invention isto produce adevice forextracting a correv from a` core-barrel which will enable thisdesirablefres'ult to be achieved, and which can be simply applied to acore-barreland simply operated to dischargethe core from the barrel, andwithout disintegrating or breaking up the core. l

Y Further objects of the invention Awill a'ppear hereinafter. y y

The invention consists in the novel parts and` combination of partstobe` described hereinafter, all of whichcontribute to produce anefficient core extracting device.

A preferred embodiment of the invention is described in the followingspecification, while the broad scope of the invention` is pointed out inthe appended claims.

In the drawing:

Figure l is a longitudinal section'taken through a core-barrel andvillustrating a pr`eferred embodiment of the invention; the View showsthe device in operationwith the core partially expelled from the barrel.n

Figure 2 is a longitudinall section upon an enlarged scale-.passingthroughf'the end of the core-barrel at which the.l extracting` plungerenters, and particularly illustra-ting `details of the construction forconnecting the plunger-head to the plunger-rod. u

Figure 3 is a cross-section taken at the po-i` sition of the line 3 3 ofFigure 2, but passing only through the plunger-head and plunger-rod tofurther illustrate details of the construction.

In practicing our invention, we provide a member with means forattaching it to the core-barrel, and this member carries a 1923.seriaifNo. 65am.

plunger which is movablev within thel barrel `for forcing thecore out ofthe'other end of the barrel. The member which isattachable to thecore-barrel may be of any suitable construction, but we prefer vtoconstruct it in the` form of a simple-head or .plug 1 which isprovided'with threads 2 at its inner end-to mesh with similar threads 3vwhich are formed at one end of the 'core-barrel 4; Through this member71 the'` plunger 45 is guidedl to move so thatrit can pass through thelinterior of the core-barrel and forcelt'he core 6 out.y of ther otherend; The plunger comprises a stem or rod`7 Awhich is mounted in-anysuitable manner-in the plug to enable it to beadvanced'through.th-efplug'whenin operation. We prefer to form this rod7 in spondinglyV threaded lopening 9 infthe'plug. u

to take place, thatis toy say,ywhich lwilleny able the plunger 5 tovengage the c ore without rotating, but at'the same time ,permit tingfree Vrotation of' therodf 7 as it. advances through the plugto V forcethe core out of the other end of the'barrel. .Forfthis purpose, weprovide the plunger with anganf In this way a' plain cylindrical tip'isformed on the end of the plunger-rod, and'thistip is received in acorresponding recess or bore 12 formed in the head 10. And we providemeans in the form of a Cotter-pin or pins 13l Anular '-groove 11 beyondthe threads 8.which4 vdo not'extend tothe extreme end of the/rod;4

which are driven into drilled holes 14 in the head located so that thepins pass through the groove 11 on 'opposite sides of the axis of therod.

It should be understood that these pins do not have to take the thrustvof the rod against the head, but are merely for effecting the swivelconnection between these two parts.

In orderl to impart the thrust from the the form of ay feed-screwbyfprovidin'g'it 70A with threads v8 which engage with the corre# Anysuitable means, such as a double-V lever 18 with handles 19, may beprovided for rotating the plunger-rod 7.

In practice, the threads 2 of the plug.

would be made to lit the standard threads 3 which are found at the endof the corebarrel` and hence no special means is necessary for attachinglthe member or plug 1 to the end of the barrel.

It will be evident that by rotating the lever 18 a considerableforce canbe everted uponthe swivel-head 10 which Will operate'to force the'coreout ot the core-barrel, and as the head rotates freely on theplunger-head 7 it can engage the end of the core Without rotation.Therefore, it Will not have any tendency to disintegrate the core, butwill merely shove the core as a Whole out of the end of the barrel. Inthis Way, if the core is carefully extracted, its. particles Will remaininthe same natural rela.-` tionswhich they had in .the ground from whichtheywere taken by thel drilh Itis understood thatv the embodimentofl theinvention described herein is only onegof the many embodiments thisinvention may take and We do not Wish vto be limited in the practice o1'our invention nor in our claims -to the particular embodiment set forth.

lwhat We claim is;

1. In ay deviceI for extracting a core from a core-barrel havingathreaded end, the combination of a plug having threads to enable thesame to be secured to the threaded end of the barrel, and a` plungerhaving a `rotatable rod guided through said plug and having aswivel-head for engaging the core to enable the core to Vbe forced outolf the other end of the barrel,'said swivel head operating to engagethe core Without rotating, and thereby ,prevent breaking upfthe core.

2. In a device for extracting a core from` a core-barrelv having aVthreaded end, the combination of a plug having threads to enable thesame to be screwed konto the end of the barrel, and a plunger having athreaded rod passing through said plug, having a handle for rotating thesame to advance the plunger through the barrel, and a swivel headcarried by the inner end of the plunger` .rod to engage the core forforcing the same Without rotating it out of the other end of the barrel.Y l

3. In a device for extract-ing a core 'from a core barrel, thecombination of'a'in'ember having means for attaching it to the corebarrel, a plunger carried'thereby having a rod threaded 1n saidl memberand operating head having means therein engaging the end Y mounted onthe end of the rod andvhaving a` Cotter received in said'groove `forconnectlng the same so as to swivel on said rod.A

5. In a `device for extracting a core from a core-barrel, thecombination. of a member having means for attaching itito thecorebarrel, a plunger having a` rodv guided through the member and movablethrough the barrel, said rod having a. circumferential groove adjacentthe inner endthereof, a head rotatably` mounted on the end of the rodand having a cotter received in said groove. for connecting the same--soas to swivel on said rod, and a ball carried by the head Vand engagingthe end of the rod to impart thrust 'from the rod to the head.

Signed at Torrance, California,this 7th day of July, 1923.

GEORGE IRvIN KENISTON. CHARLES ERNEST PRIEsTLEY.`

'[0 to move when rotated in thev barrel, a sWivel-

